Parenting blog Parent Hacks has written up a free way to entertain the kids - the local pet store.

We walked them in together, something that's SUCH a treat as they usually are in a shopping cart or stroller, and we saw the fish, birds, cats, dogs and rodents...at one point, my son was doubled over from laughing at a bunch of mice running on a wheel.

I've done this a lot with my own kiddos, and as the summer moves slowly on, I'm always on the lookout for fun (free!) entertainment ideas for the kinder. So! Fair Lifehacker readers, you know what to do - let's hear 'em in the comments.